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<?php $body = 0; function isTotallyNull($body){ if ($body !== null) { echo var_export($body,true).' is not null'.PHP_EOL; }else{ echo var_export($body,true).' is null'.PHP_EOL; } } isTotallyNull(null); isTotallyNull(1); isTotallyNull(0); isTotallyNull('lolz');

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